Spanish Lamb Stew

Name: Spanish Lamb Stew
Cuisine: European, Mediterranean, Spanish
Ingredients: 500g lamb shoulder, cubed; 2 lamb kidneys, cleaned and diced; 1 lamb liver, diced; 1 onion, finely chopped; 3 cloves garlic, minced; 2 large tomatoes, peeled and chopped; 1 green bell pepper, diced; 1 red bell pepper, diced; 2 potatoes, peeled and cubed; 1 bay leaf; 1 teaspoon smoked paprika; 1 teaspoon ground cumin; Salt and black pepper, to taste; 4 tablespoons olive oil; 500ml water or lamb stock; Fresh parsley, chopped, for garnish