Preheat the oven to 325 degrees.
In a large bowl, combine the shallots, tomatoes, vinegar, and 1 tablespoon of the everything seasoning. Toss to combine, and set aside for at least 10 minutes.
Spread the diced bagel in an even layer on a sheet pan. Toast the bagel pieces in the oven for 10-15 minutes, or until the edges start to turn golden. Remove from the oven and allow to cool.
Combine the toasted bagel pieces, cucumbers, capers, and salmon to the bowl with the tomatoes and shallots. Flake the salmon into large pieces with a fork or your fingers as you add it to the bowl. Drizzle in 1-2 tablespoons of olive oil and toss to combine. Season with additional salt, pepper, or olive oil if needed.
Divide the salad between two plates. Top with the diced cream cheese and remaining everything seasoning. Enjoy!