In a saucepan, heat the butter and cook the onions until soft. Add the garlic, tomato, half the tin of corn and half the amount of jalapeno. Cook for about 2 minutes, until tomato is almost dissolved. Remove saucepan from heat.
Put veggies in blender and puree until smooth (add a little milk if you have difficulty blending them). Return blended veggies to saucepan and add milk. Mix well and add remaining corn and jalapeno, do not let it boil.
Serve immediately and top bowls with cheddar cheese Serve with hot flour tortillas or corn bread.