One of my best sandwiches. Salmon and avocado are perfect marriage. Also those work very well with yogurt so I made exotic flavored yogurt sauce. Crispy salmon, tender buttery avocado and sliced almonds are smothered with the sweet spicy (but not too spicy) creamy sauce. To make it more delicious, I picked croissant so this sandwich has nice butter flavor yet not too heavy because of the light yogurt sauce. You would never be tired of this sandwich.
Cut the salmon fillet into small bite size. Season with salt and black pepper.
Make sauce. In a small bowl, mix together yogurt, sugar, cumin, cayenne and 1/16 teaspoon of salt.
Put enough peanut oil to deep-fry salmons into a heavy skillet or cast iron skillet or work and turn on the heat to medium high.
In a bowl, stir together rice flour and cornstarch. Coat salmons with the flour mixture. Work in a couple of batches. When the oil gets hot, put salmons into the skillet/work and deep fry salmons until golden brown, crisp and cooked through. Drain on paper towels.
Put the salmons and sliced almonds into the sauce bowl and toss to coat.
Slice avocado thinly crosswise. In a skillet, melt butter over medium heat and sauté avocado slices for 1-2 minutes until both sides are lightly browned. Season with salt and black pepper.
Assemble sandwiches. On the bottom of each croissant, place avocado slices and salmon evenly. Put the top of croissant to close each sandwich.