While you boil the yucca, you can prepare the mojo criollo. Begin by frying onion and garlic on a skillet with olive oil, only until they are tender. Add tomato sauce, 1 cup of water and the bay leaf. Cook for 15 minutes letting the sauce thicken, then add the raw shrimp and cook them just for 2 minutes. If you overcook them, they will get hard and stringy.