Marinate tuna steaks with lemon juice and place in refrigerator
Rinse asparagus and halve the lower third into long rods
Clean mushrooms, removing any hard stems
Rinse and pat dry zucchini and cut into diagonal slices
Rinse peppers, halve, remove seeds and ribs and cut into bite-size pieces
Mix vegetables and ginger, fry in wok with 1 tsp sesame oil for about 3 minutes
Add honey, teriyaki and soy sauce and keep warm
Remove tuna steaks from the refrigerator, pat dry and season with salt and pepper
Heat the remaining oil in a pan and sear the tuna for 1-2 minutes per side (or longer if needed)
Arrange tuna on top of the vegetables and serve