Tomato sauce. It’s red. It’s hot. It tastes like tomatoes and other stuff combined together and then cooked. YUM.
Chop up some garlic and an onion (or skip the onion)
Saute that stuff in olive oil Add in a can of diced tomatoes or real ones
Cook it for a while and add in some salt and pepper Add in chilli flakes if you like it spicy
Chop up and add in some fresh basil. Or dry stuff if that’s all you have.