Soak tomatoes in warm water until they're very soft, 20 to 30 minutes, then dry with paper towels.
In a large nonstick frying pan, fry eggs in 1/2 tbsp. butter over medium heat until whites are just set. Season lightly with salt and pepper.
Meanwhile, in a small bowl, combine remaining 2 tbsp. butter, 1/4 tsp. salt, pepper to taste, the parsley, thyme, and lemon juice.
Transfer eggs to a plate. Spread herb butter on 1 side of each bread slice, dividing evenly. Turn 2 slices over and top with gouda, bacon, tomatoes, and spinach, dividing evenly. Top each sandwich with a fried egg and remaining bread slices, buttered sides up. Cook sandwiches until golden brown, turning once, about 8 minutes total.
Note: Nutritional analysis is per sandwich.