Plunge tomatoes into boiling water for 30 seconds. Remove from water with a slotted spoon & slide off skins. Chop & set aside.
Saute green onions, celery & garlic in oil over medium heat until tender, give it about 5 minutes. Add the beans & reduce the heat to low. As the beans are cooking, mash them with a potato masher or a strong fork (Mark's Note: I stress a strong fork, I've mangled several doing this). Add tomatoes & simmer for 10 minutes. Serve hot.
Roll up in warmed flour tortillas topped with fresh salad vegetables & jalapeno chiles.