https://www.ediblewildfood.com/garlic-mustard.aspx
Edible Parts
Flowers, leaves, roots and seeds. Leaves in any season can be eaten but once the weather gets hot, the leaves will taste bitter. Flowers can be chopped and tossed into salads. The roots can be collected in early spring and again in late fall, when no flower stalks are present. Garlic mustard roots taste very spicy somewhat like horseradish. In the fall the seed can be collected and eaten.
