To make the dressing, whist the lemon juice, garlic, salt, and pepper in a small bowl. Slowly add the oil in a steady steam and continue to whisk. Cover and let stand until ready to use.
Tear the lettuce into small pieces into a large salad bowl. Add the bacon, tomatoes, Swiss cheese, and almonds. Toss with the dressing and Parmesan cheese. Season to taste with salt and pepper and garnish with the croutons. Serve immediately.