Preheat your oven to 400°F and line a baking sheet with parchment paper or nonstick foil for the salmon.
Add the salmon to the baking sheet, drizzle with olive oil, and season with ¼ tsp salt and ¼ tsp pepper. Bake the salmon for about 10 minutes or until it’s mostly cooked (you’ll be baking it again later, so don’t overcook now). Turn off the oven and remove the salmon. Let the salmon rest for 10 minutes before breaking it into large chunks.
½ to ¾ pound salmon, 1 tsp olive oil, 0.25 tsp salt, 0.25 tsp black pepper
Lightly grease a deep 9x13 baking dish with butter or nonstick spray to prevent sticking. Layer the bagel pieces on the bottom of the dish. Distribute the salmon on top of the bagels, then the onions and capers. Separate the cream cheese block into small pieces and distribute them evenly all over the top of the strata. We do this with 2 spoons.
½ to ¾ pound salmon, 4 day-old-bagels, 8 oz cream cheese, 3 tbsp capers, Butter or nonstick spray for baking dish, ¼ red onion
Mix up the custard by whisking together eggs, milk, nutmeg, salt, and pepper in a large bowl. Pour the custard evenly over the strata, making sure that all of the bagels and salmon and other toppings get moistened. Cover the strata in foil and place in the fridge for at least an hour or up to overnight.
8 eggs, 2 cups whole milk, 1 tsp salt, 0.5 tsp black pepper, Dash of nutmeg
When ready to bake the strata, preheat the oven to 350°F. Note: If you're using a glass dish, you may want to let it rest at room temperature for 15 minutes after refrigeration so that the glass warms up slightly before baking (extreme temperature change can damage it).
Place the baking dish, still covered in foil, into the oven and bake for 45 minutes, then remove the foil and bake for another 10 minutes. The strata is done when it’s no longer jiggly in the middle and when a toothpick inserted into the center comes out clean and mostly dry.
Top the cooked strata with the fresh dill and everything bagel seasoning. Let it rest for a few minutes before cutting it into pieces.
1 tbsp fresh dill, Everything Bagel Seasoning