Rhubarb and Berry Crisp

Ingredients

• 6 cups rhubarb (diced)
• 3 cups berries ((e.g., blueberries or halved strawberries))
• 1/4 cup honey
• 3/4 tsp cinnamon
• 1/4 tsp powdered ginger
• 1/4 tsp vanilla
• 1 cup whole-wheat flour
• 1 cup instant plain oatmeal
• 1/2 cup unsalted butter (cold, cut in 1/2 in./1 cm cubes)
• 1/3 cup honey
• 1/2 cup walnuts (chopped)