Snapper without nuts dressing

1 28-ounce can diced tomatoes in juice, well drained, juices reserved 1/4 cup extra-virgin olive oil 1/4 cup finely chopped white onion 3 large garlic cloves,[...]

1 pound onions (2 medium), chopped 1 tablespoon olive oil 3 cloves garlic, minced 1/2 to 1 whole jalapeño or serrano pepper, seeded and minced 1[...]

add to shopping list 4 tablespoons (1/2 stick) unsalted butter 1 medium onion, chopped 1 (8-ounce) container sliced button mushrooms 1/2 green bell pepper,[...]