Cook the Meat: In a medium pot or saucepan over medium-high heat, cook the ground beef (or pork sausage), stirring often, until browned, about 5 minutes. Drain the fat, leaving the meat in the pot.

Combine Ingredients: Reduce the heat to medium, then add the Rotel tomatoes (including their juices) and cubed Velveeta cheese to the pot. Stir frequently until the cheese is fully melted, about 5 minutes. If desired, mix in the chili powder for added spice.

Serve: Transfer the dip to a serving bowl or keep it warm in the skillet. Garnish with chopped cilantro if you like, and serve with tortilla chips for dipping.