Prepare the Ingredients: Begin by washing and chopping your onion and green bell pepper into small pieces. Mince the garlic cloves to release their aromatic essence.

Combine Beef and Water: In your slow cooker, place the 4 pounds of beef stew meat and sprinkle generously with salt and pepper. Pour in the ¼ cup of water.

Add Vegetables and Tomatoes: Drain the juice from the 28 ounces of canned diced tomatoes with green chilies, then layer them over the beef. Top with the chopped onion, diced bell pepper, and minced garlic.

Season the Mixture: Set the slow cooker to high heat and allow the contents to cook for 30 minutes. Add ½ teaspoon of ground cumin, ½ teaspoon of dried oregano, and 1 teaspoon of chili powder.

Prepare the Thickening Sauce: Mix the 3 tablespoons of flour with reserved juice from the drained tomatoes and add enough water to create approximately 1½ cups of liquid.

Incorporate the Sauce: Pour the thickened sauce into the slow cooker over the meat and vegetables, stirring gently to combine everything.

Slow Cook for Tender Meat: Reduce the heat to low and cover the slow cooker. Let your Carne Guisada simmer for 3 to 4 hours.

Serve and Garnish: Once cooked to perfection, ladle the Carne Guisada into bowls. Garnish with fresh cilantro, shredded cheese, pico de gallo, and sour cream.