I like to think of this recipe as more of a guide than a hard-and-fast rule. This minestrone is meant to be a pantry soup: throw in whatever you have on hand or whatever vegetables you like most. Maybe substitute rice for the macaroni or add a handful of mushrooms or other hearty greens. What makes this soup special is my ultimate pantry staple: a Genovese-style pesto. In the final moments, stir in the pesto and a squeeze of lemon, and what was once a basic pantry soup becomes a flavorful and healthy meal you can eat all week long.