Griled Tuna Sandwich W/ Grilled Red Onions & Avocado Vinaig

Yield: 4 Servings
Categories:
4Tuna steaks (5 ounces each)
2tbOlive oil
Salt and pepper to taste
1smRed onion, sliced into rings and grilled
1/3cAvocado vinaigrette
Mesclun or young lettuce
4slRipe tomato
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