Salsa with cumin

1 1/2 lbs potatoes (about 4 medium) 2/3 cup diced bell pepper (green, red, or both) 2 whole green onions , thinly sliced 2 tablespoons margarine (you may use[...]

3 canned tomatoes , from a 14 . 5-oz can of redpack whole peeled tomatoes with juice (drained) 4 garlic cloves , roasted 1/2 medium onion , roasted 1 teaspoon[...]

12 ounces tomatillos, cleaned with husks removed (Mexican green tomatoes) 1/2 small onion , chopped 1 tablespoon cilantro , fine-chopped 1 teaspoon serrano[...]