I mainly use them for garnish. If they’re whole you can make stuffed peppers, just fill with a pre-cooked stuffing, typically hamburger and rice. You can stuff them with cheese to make a variation of chile relleno.
Whir them up in a blender, pour them into a skillet in which you have garlic and olive oil frying, and make a red pepper “coulis” (sauce) to go with grilled meats or seafoods. Salt and pepper to your taste.
Excellent topping for sandwiches. Especially grilled sandwiches like chicken or burgers. I don’t think they pair well with a cheddar cheese but with something mild and creamy like swiss, mozarella or even goat cheese.
Actually, they are pretty good on like a grilled ciabatta roll with goat cheese and grilled portobello mushrooms.
Quick roasted red pepper soup: 1/2 to 1 cup of drained roasted red peppers to 1 can tomato soup, diluted to normal strength. whirl in blender or use immersion blender. garnish with fresh grated smoked gouda and fresh chopped parsley and/or dill.
add to stir fries
blend 1 to 1 with sour cream for a great chip dip, add herbs as desired (chives are good.)
I’d use it as a starter, along the lines of antipasto, by combining it with with high-quality canned fish (tuna or similar in extra virgin olive oil), olives, boiled eggs, artichoke hearts, raw (carrot, green pepper, cucumber) and pickled (cauliflower) vegetables and maybe some cheese. You can use most of this stuff to make a great sub, too. You can lay all this stuff out on a plate or make mini kebabs.