Check out recipe puppy if you don’t know what to cook. This search engine takes your input of ingredients that you have on hand and gives you recipes that you can make with them.
Their “About Us” section explains their website this way: “Recipe Puppy is a tool for finding recipes. Is your fridge nearly empty? You can use Recipe Puppy to find recipes that don’t require a trip to the store. It can find recipes that fit your dietary requirements or combine two seemingly unrelated ingredients. Recipe Puppy makes it easy to find the recipes you actually want.”
This website also also can help answer cooking questions and find recipes if you already know what you want to make.