Slice avocado in half, remove the pit, scoop out flesh into small bowl, and gently mash with fork. Stir in lemon juice and salt.
Toast the bread; top each of 4 slices with 2 lettuce leaves, a quarter of the tomato slices, 3 half strips of bacon, and a quarter of the sprouts. Spread 2 Tbsp of the avocado mixture on each of the 4 remaining slices of toast and place atop sandwiches, avocado side down. Cut in half and serve.
Nutrition Info Per Serving: Calories 285.0 Total Fat 14.7 g Saturated Fat 2.5 g Polyunsaturated Fat 2.0 g Monounsaturated Fat 5.9 g Cholesterol 22.5 mg Sodium 561.2 mg Potassium 448.3 mg Total Carbohydrate 22.0 g Dietary Fiber 12.3 g Sugars 2.7 g Protein 19.0 g