Crush blackberries in a bowl until smooth. Add passion fruit juice, soy sauce, lemon juice, honey, parsley, sea salt, and pepper and stir until marinade is thoroughly mixed.
Place tuna in a glass dish and pour marinade over top; flip several times to coat. Cover the dish with plastic wrap and marinate in the refrigerator for 2 hours.
Remove tuna from the marinade and shake off excess. Discard the remaining marinade.
Heat a nonstick skillet over medium-high to high heat. Sear tuna in the hot skillet for 1 to 1 1/2 minutes per side.
Remove from the skillet and slice into 1/4-inch thick slices.
Nutritional Facts
Per 4 servings
Calories: 227
Carbohydrate: 10g
Fat: 2g
Fiber: 0g
Protein: 41g
Sugar: 9g
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