How to Make It
Bring stock and beans to a simmer in a small saucepan over medium heat. Cook 10 minutes, stirring occasionally. Remove pan from heat. Place bean mixture, butter, 3/8 teaspoon salt, and 3/8 teaspoon black pepper in the bowl of a food processor; process until smooth.
Heat a large nonstick skillet over medium heat. Add oil to pan; swirl to coat. Sprinkle shrimp with the remaining 1/4 teaspoon salt and remaining 1/4 teaspoon black pepper. Add shrimp to pan; cook 4 minutes, stirring occasionally. Remove pan from heat. Stir in chili sauce.
Heat rice according to package directions.
Divide bean mixture and rice among 4 shallow bowls; top evenly with shrimp, cilantro, and avocado. Sprinkle with cheese. Serve with lime wedges.