If you only have salt-cured capers, be sure to rinse them well before adding to this dish. Slideshow: More Salmon Recipes
Preheat the oven to 350°F.
Place the salmon on a baking sheet and drizzle with the oil. Sprinkle with 1/2 teaspoon salt and 1/4 teaspoon pepper. Scatter the lemon slices, capers, and oregano sprigs over the salmon, then bake until just cooked through, about 15 minutes. Serve.
A good base, but needs either some sliced garlic or shallot, plus some white wine in the sauce.