Tuna Tartare

I made this last night and it is so good! It is somewhat of a ceviche, but the tuna remains pretty rare.
I adapted it from http://humblegourmand.com/recipes/tuna-tartare/

Ingredients:

12 oz. sushi-grade ahi tuna steak, diced into 1/2" pieces
1 ripe Haas avocado, diced
1 large jalapeno, seeded and diced
1 medium red onion, diced
1 medium cucumber, diced
2 cloves garlic, finely chopped or put through a press
Juice from 2 limes
1 Tbsp. extra virgin olive oil
kosher salt
Freshly ground black pepper

Combine all ingredients except fresh lime juice in a bowl. After mixing, squeeze the juice over the mixture and let it soak in the refrigerator for about 20 minutes.

-- Katy