Prep the veggies: Peel and cube the sweet potatoes into even 1/2-inch pieces so they cook quickly and evenly.
Dice the onion and pepper, and mince the garlic.
Set the pressure cooker to Sauté: If your beef is lean, add olive oil. When hot, add the ground beef and 1/2 teaspoon salt. Cook, breaking it up, until browned with a little crisp on the edges, about 5–7 minutes.
Sweat the aromatics: Add the onion and bell pepper.
Stir and cook until softened, about 3 minutes. Add garlic and cook 30 seconds until fragrant.
Season and deglaze: Stir in tomato paste, smoked paprika, cumin, chili powder, oregano, black pepper, and the remaining 1/2 teaspoon salt. Cook 1 minute to bloom the spices.
Pour in the broth and scrape up any browned bits on the bottom to prevent a burn notice.
Add sweet potatoes: Fold in the cubed sweet potatoes, coating them well with the seasoned mixture.
Pressure cook: Seal the lid and cook on High Pressure for 3 minutes. This short time keeps the sweet potatoes tender but not mushy.
Quick release: Once the timer ends, carefully quick-release the pressure. Open the lid away from you to avoid steam.
Finish and adjust: If using spinach or kale, stir it in now.
The residual heat will wilt it in about a minute. Squeeze in lime juice for brightness. Taste and adjust salt, pepper, or chili powder as needed.
Serve your bowls: Spoon over rice, quinoa, or cauliflower rice, or enjoy as is.
Top with cilantro or green onions. Add avocado, a dollop of yogurt or sour cream, and hot sauce if you like.