Fry onion, garlic, ginger, and apple in vegan butter.
Add flour, curry powder, and tomato paste.
Stir well.
Gradually add water, soy sauce, ketchup, agave, and salt.
Simmer 10 minutes, then blend until smooth.
Adjust seasoning.
For katsu: dredge tofu in seasoned corn starch, then plant milk, then panko.
Fry until crispy and golden.
For quickles: mix all ingredients and let sit.
Serve curry with rice, tofu katsu, and quickles.
