Eggs with onion

6 tablespoons butter , divided 1 cup chopped onion 2 cloves garlic , chopped 1/2 teaspoon dried oregano 1 (14 1/2 ounce) can petite diced tomatoes with juice[...]

4 tablespoons olive oil 1 small onion , finely chopped 1 lb tomato , peeled, seeded and chopped 2 tablespoons chopped fresh basil 6 eggs salt & freshly ground[...]