Red pepper and tomato ragout

Name: Red pepper and tomato ragout
Cuisine: Cuban, Latin American
Ingredients: • ¼ cup (60 ml/2 fl oz) vegetable oil or extra-virgin olive oil; 2 medium onions, halved through the root and thinly sliced; •3 large green or red bell peppers (about 1½ lb/680 g), sliced into strips ⅛ inch (1.25 cm) wide; •1 teaspoon sugar; • ¼ teaspoon kosher salt, plus more as needed; • 1 tablespoon sweet paprika; • ⅐ teaspoon onion powder; • ½ teaspoon cayenne pepper; • 2 tablespoons tomato paste (purée); 795g Canned (chopped) tomatoes; • Freshly ground black pepper