Our kid has always eaten red peppers as if they were potato chips. Never refuse a kid who wants vegetables. (I guess potato chips are technically vegetables, but you know what I mean.)
While plain, raw peppers are crunchy and juicy and tasty, cooked peppers make for a colorful side dish. And this recipe, from Patricia Wells’ cookbook “Vegetable Harvest,” is a winner for entertaining because it can be made ahead and served hot or at room temperature. As Wells points out, leftovers are good as a sauce on pasta or polenta. They also freeze well, so don’t hesitate to make a lot.
Red Peppers, Tomatoes, Onions, Cumin and Espelette Pepper, from “Vegetable Harvest” by Patricia Wells
2 tablespoons whole cumin seeds
4 red bell peppers (or a mix with yellow and orange–as long as they are the sweet kind)
2 tablespoons olive oil
1 teaspoon salt
2 medium onions, peeled, halved, and thinly sliced (I used an enormous red onion, which is pretty)
1 teaspoon ground piment d’Espelette (substitutes: dried Anaheim chilies, ground mild chili pepper or paprika)
2 pounds tomatoes, cored and cubed but not peeled 
Toast the cumin in a small, dry skillet, shaking regularly because they can scorch quickly. About two minutes. Transfer to a plate to cool.
Cut the cleaned peppers quarters and then into 1/8-inch-thick slices. 
Heat the olive oil in a large skillet and add the onions, cumin, piment d’Espelette and salt. Cover and let it sweat over low heat for three to four minutes.
Add the peppers and tomatoes and cook, covered, over low heat until the peppers are soft and tender, about 30 minutes. I’ve made this recipe a lot, and I’ve reduced the tomatoes a little and cooked the peppers with the onions so they soften before adding the tomatoes toward the end. It makes the result a little less juicy/soupy.
By the way, I love, love, love this cookbook. I’ve made many of its recipes, and they are delicious but not difficult. And they all have a French flair.
Taste of France 