In a large pot, warm 1 tablespoon oil over medium-high heat. Add the meat, use a metal spatula to break into chunks, sprinkle with ½ teaspoon salt, then let it cook, undisturbed for 3-5 minutes or until nicely browned (this adds lots of flavor). Once browned, break the meat into smaller chunks, then use a slotted spoon or spatula to transfer to a plate or bowl. Drain off any excess fat (depending on the meat you use, there may be a little or a lot).
Reduce the heat to medium, add the remaining 2 tablespoons oil, garlic, and tomato paste and cook for about 3 minutes, or until the tomato paste turns a darker red color, stirring often. Caramelizing the tomato paste gives the broth a ton of flavor.
Stir in the smoked paprika and red pepper flakes (if using) for just 10 seconds, stirring constantly. Immediately stir in the water, bell pepper, couscous, ground meat, and remaining 1 ½ teaspoons salt.
Bring to a boil over high heat, then reduce the heat to medium/medium-low and simmer rapidly, uncovered, for about 15 minutes, or until the couscous is cooked through, stirring every few minutes to make sure the couscous isn’t getting stuck on the bottom of the pot.
Serve topped with a dollop of yogurt or sour cream, herbs, and olive oil.