Meatball and Olive Stew (Albondigas Verdes)

INGREDIENTS

• 1 pound ground beef
• 1 pound ground pork
• 2 tablespoons uncooked white rice
• 1/2 small onion, minced
• 2 eggs, beaten
•  
• 1/4 pound fresh tomatillos, husks removed
• 2 jalapenos (optional)
• 1 1/2 small white onions, quartered
• 1 teaspoon minced garlic
• 1/2 cup chopped cilantro
• 8 ounces pitted green olives
• 1 cup water
• 1 tablespoon olive oil
• 3 cups water
• salt to taste