Authentic Mexican Picadillo

Name: Authentic Mexican Picadillo
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Cuisine: Mexican
Ingredients: 6 tomatoes; 0.75 cup water; 0.25 onion, halved; 1 clove garlic; 3 tablespoons vegetable oil; 0.5 onion, chopped; 1 serrano pepper; 1 clove garlic, minced; 1 tomato, chopped; 2 pounds lean ground beef; 1 (7.75 ounce) can Mexican-style hot tomato sauce (such as El Pato®); 3 potatoes, peeled and cubed; 3 medium carrots, peeled and cubed; 1 jalapeno pepper, sliced; 2 tablespoons chicken bouillon granules; 0.5 tablespoon ground cumin; 1 bay leaf; salt and ground black pepper to taste