BLT Salad

8 bacon slices, cut into bite-size pieces 

1 baguette, cut into bite-size cubes 

2 Tbs. olive oil   

1/2 cup sour cream   

2 Tbs. fresh lemon juice  

2 Tbs. grated Parmigiano-Reggiano cheese   

1 tsp. salt   

1 garlic clove, chopped 

1 head romaine lettuce, chopped 

1 pint mixed red and yellow cherry tomatoes, halved