Prep your surface: Use a large board, platter, or a couple of baking sheets lined with parchment.
Give yourself space so nothing feels cramped.
Slice the bagels: Cut bagels in half horizontally. Toast just before serving if you like a warm, crisp edge. Keep a mix of toasted and untoasted to please everyone.
Whip the cream cheese: In separate bowls, stir the plain and flavored cream cheeses until smooth and spreadable.
A quick whisk makes them fluffy and easy to smear.
Prep the veggies: Slice cucumbers, tomatoes, red onion, radishes, and avocado. Pat tomatoes dry with a paper towel to avoid soggy bagels.
Arrange the salmon: Fold smoked salmon slices into loose ribbons and fan them out on the board. Keep it chilled until the last minute for best texture.
Add herbs and extras: Scatter dill sprigs, chives, and parsley near the salmon. Place lemon wedges and capers in small bowls to contain the brine.
Create spread zones: Spoon cream cheeses into small bowls and place them around the board.
Add a small dish of butter if using.
Season smartly: Set out flaky salt, black pepper, and everything seasoning. A sprinkle over tomatoes or avocado goes a long way.
Finish with color and height: Tuck greens under edges for contrast. Stack bagel halves upright in a basket or along the side to save space.
Serve immediately: Put out small knives and spoons for spreads and toppings.
Encourage guests to build their bagel and go back for seconds.