Ahi Tuna Tostadas

Name: Ahi Tuna Tostadas
Ingredients: 8 oz raw sushi grade ahi tuna filets; 4 tostadas (I used El Ranchero Thin Tostadas); 1 1/2 avocado (125g/4.5 oz); 1 small jalapeno, thinly sliced; Lime juice; Green onions; Cilantro; 1 tbsp low sodium soy sauce (tamari for GF); 1 tbsp rice wine vinegar; 1/2 tbsp sesame oil; 1 tsp chili paste, like Sambal Oelek; 1 green onion, sliced very thin; 1/3 cup non fat plain Greek yogurt; 1 small jalapeno, seeded and diced; 1 tbsp lime juice; 2 tbsp cilantro, chopped; 1/4 tsp salt