Course grind tuna belly and fillet in a meat grinder. Place ground tuna in bowl and add garlic, orange zest, wine, salt, pepper flakes, olive oil, and parsley. Mix well. Fill casings twisting between sausages. Makes approximately 10 six-inch sausages or 20 three-inch sausages.
Prick sausages and steam on a rack over water in a 500ยบ oven for 15 minutes or fry sausages in non-stick skillet.
Notes
Serve with lemon wedges. I also like to thinly slice cooked sausages and add them to Marinara sauce and serve on a bed of fresh linguini.