Line a sieve with cheesecloth or paper towels and suspend it over a bowl. Pour the yogurt into the sieve and allow it to drain, refrigerated, for 3 hours or overnight.
Place the thickened yogurt into a medium bowl and add the almonds (reserving 1 tablespoon for the garnish), honey, vanilla, and orange zest. Thin with peach nectar until it is a desirable consistency.
Add the raisins, peach (reserving 1 tablespoon for garnish) and raspberries (reserving 2 tablespoons for garnish). Spoon into individual bowl or glasses and garnish with the reserved almonds, peach and raspberries.