Kataifi with Candied Pumpkin and Yogurt

Drain yogurt in a sieve lined with a dampened paper towel or coffee filter and set over a bowl 1 hour, then discard liquid and stir drained yogurt and 1 1/2 tablespoons honey together in a small bowl until honey is dissolved.
While yogurt drains, bring water, granulated sugar, lemon zest and juice, cinnamon, and remaining cup honey to a boil in a 3- to 4-quart heavy pot over moderately high heat, stirring until sugar is dissolved, then add pumpkin and bring to a boil. Reduce heat and simmer pumpkin, covered, until tender but not falling apart, 15 to 20 minutes. Transfer pumpkin to a bowl using a slotted spoon, then boil syrup until reduced to about 1 1/2 cups, 5 to 8 minutes.
Put oven rack in middle position and preheat oven to 375°F. Stir together butter and confectioners sugar until combined well. Gently pull apart strands of kataifi in a large bowl to loosen, then toss with butter mixture and almonds until coated well. Divide kataifi among 12 muffin cups and press into bottoms and halfway up sides of the muffin cups, creating nests. Bake kataifi until the outsides are golden, 12 to 18 minutes (check by gently lifting one out of a muffin cup with a paring knife or small offset spatula), then cool completely in tin on a rack.
Transfer kataifi nests to serving plates. Just before serving kataifi, spoon about 1/3 cup pumpkin into each nest, then drizzle each with about 1 1/2 tablespoons syrup and top with a tablespoon of yogurt.