In a small bowl, combine water, yeast, and 1 teaspoon granulated sugar; stir to dissolve yeast. Let stand until foamy -- about 5 minutes.
2
In a large bowl, combine remaining 2 tablespoons granulated sugar, the flour, and salt. Add yeast mixture and eggs; with wooden spoon, beat flour mixture 5 minutes. The dough will be wet. Cover bowl with a clean kitchen towel; let dough rise in warm place, away from drafts, until doubled in size -- about 1 1/2 hours.
3
Lightly coat a 10-inch ring mold with cooking spray. With a wooden spoon, beat butter into dough; spoon into ring mold. Cover with kitchen towel and let rise in warm place until nearly doubled in size -- about 1 hour.
4
Heat oven to 375 degrees F. Bake until golden brown and firm -- 20 to 25 minutes. Let cool in pan 10 minutes. Loosen savarin from pan; unmold onto wire rack and let cool 15 minutes.
5
To serve, place savarin on cake plate. Fill center with strawberries and dust with confectioners'' sugar, if desired.
