Heat oil in a large pan over medium heat and sauté meat for 1-2 minutes, stirring frequently. Add onions, garlic and carrots and cook until onions become translucent, about 3-5 minutes. Add beans, bay leaf, red pepper flakes, cheese and stock. Bring to a simmer and stir in chopped greens. Simmer, covered, until sauce thickens and flavors meld, about 15 minutes more. Season with salt and pepper to taste. To serve, divide greens and beans evenly among 4 serving bowls. Garnish with freshly grated cheese, drizzle with olive oil and serve hot. This is a one-dish meal that satisfies in every way!