Stir in garlic and seasoning; cook an additional 2 minutes.
Add mustard greens and hominy. Reduce heat and simmer for 10 minutes.
Add lemon juice and shrimp; cook 5 minutes more until warmed through.
Make sure to not add shrimp until right before serving as they tend to get tough if cooked to long. Mustard greens and hominy can be simmer for up to 30 minutes.