Tuna Salad Sandwiches (with Eggs, Radishes, and Capers)

Yet another Cook's Country pick. I modified the recipe slightly, and I would make a few more tweaks next time. Nice change from your bog standard tuna salad for lunch or a light dinner though.

Tuna Salad Sandwiches
Slightly adapted from Cook's Country April/May 2015
1 onion, minced
6 Tbsp. extra virgin olive oil, divided
3 cans low-sodium solid white albacore tuna in water
2 ribs celery, minced
2 tsp. lemon juice
1/2 tsp. sugar
1/4 tsp. coarse sea salt
1/2 tsp. black pepper
3 radishes, halved and sliced thin
2 hard-boiled eggs, sliced thin
1/4 c. capers, rinsed and minced
4 slices bread, toasted

1. Combine onion and 2 Tbsp. olive oil. Microwave on high for 2 minutes. Let stand 5 minutes.
2. Drain tuna well and pat dry. Break up with a fork.
3. Combine tuna and all remaining ingredients with softened onion. Adjust seasoning to taste.
4. Assemble your sandwiches! Serve with a nice salad on the side and enjoy!