Bake nuts in a 9-inch pie or cake pan in a 350° regular or convection oven until golden beneath skins, shaking pan once, 7 to 9 minutes.
Meanwhile, in a 10- to 12-inch frying pan over high heat, bring about 1 inch water to a boil. Rinse asparagus and snap off tough stem ends. Add asparagus or broccoli to pan and boil, uncovered, until bright green and barely tender when pierced, 2 to 3 minutes. Drain; rinse with cold water until cold.
Rinse salmon and pat dry. Coat flesh sides equally with all the spice rub. Lay fish, coated side down, on a grill over hot coals or high heat on a gas grill (you can hold your hand at grill level only 2 to 3 seconds); close lid on gas grill. Cook fish, turning once, until opaque but still moist-looking in center of thickest part (cut to test), 7 to 9 minutes total. Transfer to a plate.
Rinse Belgian endive; trim off and discard discolored ends. Set aside 12 leaves; cut remaining leaves crosswise into 1/4-inch-wide slices and place in a bowl. Add salad greens, tomatoes, onion, and 1/4 cup raspberry vinaigrette; mix gently.
Arrange asparagus and whole endive leaves equally around edges of plates. Mound salad mixture equally in center of plates; top with warm salmon. Sprinkle servings equally with walnuts, raspberries, and soybeans. Drizzle remaining vinaigrette over the top. Serve with pumpernickel rolls.
Spice rub: In a blender, whirl 1 tablespoon each coriander seeds and fennel seeds and 1 1/2 teaspoons each dried thyme and black peppercorns until finely ground. Makes about 3 tablespoons.
Raspberry vinaigrette: In a small bowl, whisk together 3 tablespoons raspberry vinegar, 2 tablespoons extra-virgin olive oil, 1 tablespoon walnut oil (optional), and 1 1/2 teaspoons Dijon mustard. Add salt and pepper to taste. Makes about 1/2 cup.