I realize the OP asked for a pretzel bun recipe, but here is my "go-to" all time favorite bread dough recipe ever, and especially for serving with my PP. It is really nice because it is so versatile to make a lot of different things, such as buns, parker house rolls, crescent rolls, cinnamon rolls, sesame or poppy seed buns, etc. The best part is you make the dough ahead and is meant to leave it in your fridge, then have fresh rolls all week as you need it! But mine doesn't last that long. (Oh... and one more thing... do yourself a favor and go to the store to get some FRESH GOOD bread flour, and yeast when you make it.)
Potato Refrigerator Dough
1 Package active dry yeast
1 1/2 cups warm water (105-115')
1/2 cup sugar
1 1/2 teaspoons salt
2/3 cup shortening
2 eggs
1 cup lukewarm mashed potatoes*
6 1/2 to 7 cups all purpose flour**
* Instant mashed potatoes can be substituted for the mashed potatoes; prepare as directed on package for 2 servings
** If using self-rising flour, omit salt.
Dissolve yeast in warm water in a large mixing bowl. Stir in sugar, salt shortening, eggs potatoes and 4 cups of the flour. Beat until smooth. Mix in enough remaining flout to make dough easy to handle.
Turn dough onto lightly floured surface, knead until smoot and elastic, about 5 minutes. Place in greased bowl; turn greased side up. Cover bowl tightly; refrigerate at least 8 hours but no longer than 5 days. Punch down dough. Shape. let rise and bake as directed.
Parker house rolls
Prepare Potato Refrigerator Dough. Divide into halves (refrigerate 1 half for future use) Divide remaining half of dough in halves. Roll 1 half into rectangle 13/9 inches., cut into 3-inch circles; brush with margarine or butter softened. Fold each so top half overlaps slightly. Press edges together. Place close together in greased round baking pan 9x1 1/2 inches. Brush with margarine or better softened. Repeat with remaining dough. Let rise until double, 45 to 60 minutes. Heat oven to 400' Bake until light brown 13- 15 minutes. 20 rolls.
Credit: Betty Crocker- Best of Baking