Unroll bread dough. Cut into three equal pieces. Roll each piece into an 18 to 20 inch long strip. Braid strips. Join ends to form wreath and place on ungreased baking sheet.
Combine 1 Tbsp. milk and egg (reserve 1 Tbsp. milk for glaze). Whisk thoroughly. Brush on top of wreath. Sprinkle tinted sugar and cinnamon on top. Set aside in a warm, draft-free place. Let proof until approximately doubled in size, about 1 1/2 hours
Preheat oven to 350°F. Bake wreath 45 minutes (should sound hollow and be golden brown).
Mix reserved milk, powdered sugar, and vanilla until smooth. Fill decorating bag or sandwich bag approximately 1/3 full. Snip off end of bag. Starting at inside edge, pipe a continuous line from inside to outside all around wreath. Repeat if necessary until glaze is gone or desired coverage is achieved.
Divide ready to spread frosting into two bowls. Tint one green and one red. With green: fill bag. Cut bag tip into a point (or use a leaf decorating tip). Pipe clusters of three leaves (base of leaves joined in center, points of leaves facing out) randomly around top of wreath. With red: fill bag. Snip off end. Pipe three small red berries in centers of leaf clusters. Snip off more of bag to make enlarge hole. Pipe a bow where the ends of the bread dough was joined.