1 pkg. active dry yeast
1 tbsp. sugar
1 1/2 c. shredded cheddar, Swiss or Provolone cheese (6 oz.)
1/4 c. grated Parmesan cheese
1/4 c. finely chopped onion
2 tbsp. sesame seed
2 1/2 - 3 c. all purpose flour
2 c. finely chopped cooked chicken
1 (10 oz.) pkg. frozen chopped spinach, thawed & drained
1 beaten egg white

In mixer bowl dissolve yeast in 1 cup warm water (105-115 degrees). Add 1 cup flour, sugar and 1 teaspoon salt. Beat on low 30 seconds; scrape bowl constantly. Beat on high 3 minutes. Stir in as much of remaining flour as you can. Turn out onto lightly floured surface. Knead in enough of remaining flour to make moderately soft dough that is smooth and elastic (3 to 5 minutes). Cover; set aside.

For filling, combine next five ingredients and 1/4 teaspoon salt. On lightly floured surface, roll dough into 16"x10" rectangle. Spread filling lengthwise down center third of dough. Bring long edges together over filling; seal. Seal ends. Place, seam side down on lightly greased baking sheet. Brush with mixture of egg white and 1 tablespoon water. Sprinkle with sesame seed. Bake in 375 degree oven for 40 minutes or until loaf sounds hollow when tapped. If needed, cover with foil last 10 minutes to prevent over browning. Serve warm or chilled. Makes 8 main dish servings.