Heat the olive oil in a large skillet over medium-high heat.
Add the lean ground beef, breaking it apart with a spatula, and cook until browned.
Stir in the diced onions and bell peppers, sautéing for 3-4 minutes until the vegetables begin to soften.
Add the chili powder, cumin, garlic powder, sea salt, and black pepper, stirring for 1 minute to toast the spices.
Pour in the tomato puree, water, and rinsed black beans.
Reduce the heat to low, cover, and simmer for 10-12 minutes to allow the flavors to meld and the sauce to thicken.
Serve warm in a bowl, optionally garnished with fresh cilantro or a squeeze of lime.