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Copper Sun Companion Series

Quinoa and black bean stuffed peppers

August 5, 2026 · 3 min read

Halved bell peppers filled with quinoa, black beans, corn, and diced tomato baked until tender in a ceramic dish
Serving suggestion — your result will vary

Stuffed peppers usually lean on rice and cheese. Swap in quinoa and a can or two of black beans and the filling does more work: it holds together, carries the cumin and garlic, and stacks up whole grain, legumes, and vegetables in a single pepper half. Four MIND food groups land on the plate at once — a whole grain, beans, other vegetables, and the olive oil they cook in — at about 450 calories a serving.

The order is forgiving. Steam the quinoa, build the filling in one skillet while it cooks, then spoon it into halved peppers and let the oven finish the job. Halving the peppers lengthwise beats standing them upright: they bake faster, hold more, and two halves make a serving.

4 servingsPrep 15 minCook 35 min~450 cal / serving

Ingredients

  • 1 cup dry quinoa, rinsed
  • 2 cups water
  • 4 large bell peppers, halved lengthwise and seeded
  • 3 tablespoons olive oil, divided
  • 1 onion, diced
  • 3 garlic cloves, minced
  • 2 15-ounce cans black beans, drained and rinsed
  • 1 cup corn kernels, fresh or frozen
  • 1 teaspoon ground cumin
  • 1/2 teaspoon salt

Steps

  1. Rinse the quinoa, combine it with the water in a saucepan, and bring to a boil. Lower to a simmer, cover, and cook about 15 minutes until the water is absorbed and the grains uncurl their little tails. Take it off the heat and fluff with a fork.
  2. While the quinoa cooks, warm 2 tablespoons of the olive oil in a skillet over medium heat. Add the diced onion and cook 5 minutes until soft, then stir in the garlic and cumin and cook another 30 seconds. Fold in the black beans, corn, salt, and the cooked quinoa, and warm it all through for a minute or two.
  3. Heat the oven to 400°F. Halve the peppers lengthwise, pull out the seeds and ribs, and set them cut-side up in a baking dish. Brush the outsides with the remaining tablespoon of olive oil.
  4. Spoon the filling into each pepper half, mounding it a little. Cover the dish with foil and bake 25 minutes, then uncover and bake 10 minutes more until the peppers are tender and the tops catch a bit of color. Serve warm.
Per serving (approx): 66 g carbs · 15 g fiber · 17 g protein · 15 g fat

How it comes together

Makes 4 servings — read left to right; each column combines what's behind it.

PrepHalve the peppers lengthwise instead of standing them upright — flat halves hold more filling, cook faster, and plate two to a serving.

1 cup · 170 g dry quinoarinsedCook the quinoaStuff and bake
2 cups · 480 g water
3 tbsp · 42 g olive oildivided — 2 for the filling, 1 to brushMake the filling
1 oniondiced
3 garlic clovesminced
2 cans · 500 g black beans15-oz cans, drained and rinsed
1 cup · 145 g corn kernelsfresh or frozen
1 tsp ground cumin
½ tsp salt
4 bell pepperslarge, halved and seededHalve and prep the peppers

Scaling adjusts quantities only — cooking times and pan sizes may need judgment. Grams are rounded for the kitchen.

Notes and swaps

Farro or brown rice trades in for the quinoa cup for cup and keeps it a whole grain. Pinto or kidney beans stand in for the black beans without changing the method. A diced tomato folded into the filling, or a handful of chopped cilantro at the end, brightens it up if you want more color.

The MIND pattern keeps cheese light, so this recipe skips it — but a small sprinkle over the tops in the last ten minutes is an easy option if you want the melt. For heat, a diced jalapeño or a pinch of chili powder goes in with the cumin. Leftovers reheat well, and the filling on its own makes a good grain bowl the next day.

Say what went in the peppers and MIND Diet Companion (coming soon to the App Store) shows how the day is shaping up against the pattern — no weighing, no barcode scanning.

FAQ

Do I have to cook the quinoa first? Yes. Quinoa needs its own simmer to soften and absorb water; the oven time here is set for tender peppers, not raw grain. Cook it through before it goes in the filling.

Can I make these ahead? The filling keeps three days in the fridge and the assembled peppers reheat cleanly, so this is a good batch-cook dinner. Stuff and bake fresh, or fill the raw peppers ahead and bake when you're ready.

What makes this a MIND recipe? It builds on food groups the MIND pattern leans on — a whole grain in the quinoa, legumes in the black beans, other vegetables in the peppers, onion, and corn, all cooked in olive oil. One pepper half covers several at once.

How do I keep the peppers from going soggy? Drain and rinse the beans well, and don't overfill with anything wet. Covering the dish for the first stretch steams them tender, then uncovering lets the tops dry out and color.

What do I serve alongside? A green salad, a scoop of guacamole, or a dollop of plain yogurt rounds the plate. See read a recipe at a glance for how the cook-then-stuff order fits together, and the MIND diet for where this sits in the wider pattern.