Preheat oven to 400°F (200°C). Slice 1 lemon half into 4 thin slices, then grate 1 Tbsp. (15 mL) lemon peel from remaining lemon half; set aside.
Combine fennel, shallot, Becel Olive Plus™ Oil Blend, 1/4 tsp. (1 mL) salt and 1/8 tsp. (0.5 mL) peppercorns in baking sheet with shallow sides and arrange in single layer. Top with salmon. Sprinkle salmon with remaining 1/4 tsp. (1 mL) salt and 1/8 tsp. (0.5 mL) peppercorns, then top with lemon slices. Bake until salmon flakes with a fork and fennel is crisp-tender, about 30 minutes.
Garnish with chopped fennel fronds and lemon peel.