In the same pan, heat a thin layer of oil on medium-high. Once the oil is hot enough that a pinch of potato flakes sizzles immediately when added, add the coated fish. Cook 4 to 5 minutes, or until browned. Flip and cook 3 to 4 minutes, or until browned and cooked through.* Turn off the heat. Serve the cooked fish with the finished potatoes and cooked green beans. Top the fish with the caper mayo. Enjoy!
In a medium pan (nonstick, if you have one), heat a drizzle of olive oil on medium-high until hot. Add the prepared green beans in an even layer. Cook, without stirring, 3 to 4 minutes, or until lightly browned. Add the chopped garlic and chopped peppers; season with salt and pepper. Cook, stirring occasionally, 1 to 2 minutes, or until slightly softened. Add 2 tablespoons of water (carefully, as the liquid may splatter). Cook, stirring occasionally, 1 to 2 minutes, or until the green beans are softened and the water has cooked off. Transfer to a bowl. Taste, then season with salt and pepper if desired. Cover with foil to keep warm. Wipe out the pan.
Meanwhile, place the spice blend and potato flakes on two separate large plates. Crack the egg into a large bowl; season with salt and pepper. Beat until smooth. Pat the fish dry with paper towels; season with salt and pepper on both sides. Working one piece at a time, thoroughly coat the seasoned fish in the spice blend (tapping off any excess), then in the beaten egg (letting the excess drip off), then in the potato flakes (pressing to adhere). Transfer to a separate plate.
Place the potato wedges on a sheet pan. Drizzle with olive oil and season with salt and pepper; toss to coat. Arrange in an even layer. Roast 21 to 23 minutes, or until browned and tender when pierced with a fork. Remove from the oven. Immediately top with the vinegar and a big pinch of salt. Carefully stir to coat.
*an instant-read thermometer should register 145°F.
Place an oven rack in the center of the oven, then preheat to 450°F. Wash and dry the fresh produce. Cut the potatoes into 1-inch-wide wedges. Cut off and discard the stem ends of the green beans. Peel and roughly chop 2 cloves of garlic. Roughly chop the peppers. Roughly chop the capers. In a bowl, combine the mayonnaise and chopped capers. Taste, then season with salt and pepper if desired.