Cut beef Shoulder Roast into 1/2-inch pieces. Heat 1 tablespoon oil in stockpot over medium heat until hot; brown beef in batches and remove from stockpot. Season with salt.
Heat remaining 1 tablespoon oil in same stockpot over medium heat. Add garlic; cook and stir 1 minute. Add beef, tomatoes, beer, adobo sauce and chipotle peppers; bring to a boil. Reduce heat; cover tightly and simmer 1-1/2 to 1-3/4 hours or until beef is fork-tender.
Stir in beans and masa harina; return to a boil. Reduce heat; simmer 1 to 2 minutes or until slightly thickened, stirring constantly. Serve with sour cream, as desired.
Nutrition information per serving: 329 Calories; 104.4 kcal Calories from fat; 11.6 g Total Fat; 3.3 g Saturated Fat; 0.3 g Trans Fat; 2.6 g Polyunsaturated Fat; 4.1 g Monounsaturated Fat; 84 mg Cholesterol; 738 mg Sodium; 21 g Total Carbohydrate; 6.3 g Dietary Fiber; 3.6 g Total Sugars; 33 g Protein; 0 g Added Sugars; 47.6 mg Calcium; 4.5 mg Iron; 674 mg Potassium; 5.2 mcg Vitamin D; 0.3 mg Riboflavin; 4.5 mg NE Niacin; 0.5 mg Vitamin B6; 2.9 mcg Vitamin B12; 282 mg Phosphorus; 8.6 mg Zinc; 61 mcg Selenium; 107.1 mg Choline;