Mix lukewarm water, yeast, 2 tbs sugar, and salt in medium pot. After yeast mixture is bubbly, add 2 cups flour and mix well. Add rest of flour slowly to make dough. Place on floured surface and knead until smooth. Oil surface well. Place in large pot, cover, and let rise (1 hour). Knead second time and roll into a thin sheet on a floured surface. Spread soft margarine, sprinkle on sugar, cinnamon, and pecan pieces. Roll into a log and pinch ends shut. Spiral log onto greased large pot lid and press down until log covers bottom of lid. Spread more margarine on top. Bake in pre-heated Dutch oven 30-45 minutes. Slice while warm but not hot.