Tomato Pasta Bake

some cooked penne pasta,
fresh grape tomatoes,
grated cheese
a tin of condensed tomato soup
some finely chopped white onion

Put the pasta, tomatoes, onion and soup into a casserole dish
Top with as much or as little cheese as you like
Bake in the oven til the dish is heated through, the cheese is melted and it’s all bubbling.