Instructions

Fry bacon in large stockpot or Dutch oven over medium-high heat, stirring occasionally, until fat is rendered and bacon is crisp, 3 to 4 minutes. Add onion and carrots; cook, stirring occasionally, until vegetables begin to soften, about 2 minutes. Add garlic and cook until fragrant, about 30 seconds. Stir in tomatoes, bay leaf, and thyme; cook until fragrant, about 30 seconds. Stir in lentils, salt, and pepper to taste; cover, reduce heat to medium-low, and cook until vegetables are softened and lentils have darkened, 8 to 10 minutes. Uncover, increase heat to high, add wine (if using), and bring to simmer. Add chicken broth and water; bring to boil, cover partially, and reduce heat to low. Simmer until lentils are tender but still hold their shape, 30 to 35 minutes; discard bay leaf.
Puree 3 cups soup in blender until smooth, then return to pot; stir in vinegar and heat soup over medium-low heat until hot, about 5 minutes. Stir in 2 Tablespoons parsley and serve, garnishing each bowl with some of remaining parsley.