Add the garlic and cook, stirring, until fragrant, about 3 minutes. Add the tomatoes, broth, and ginger. Bring to a boil over high heat.
Reduce the heat to low, then, while whisking, slowly pour in the beaten eggs.
Add the red pepper flakes, if using, and season to taste with salt and black pepper.
Remove from the heat and serve.
Notes
Splash in some soy sauce or tamari along with a sprinkling of chopped green onions for extra flavor.Whisk the eggs slowly and steadily while pouring them into the hot broth. This ensures the eggs form delicate, silky ribbons rather than clumping together, creating the smooth texture that makes this soup so comforting.