Heat the water in a small saucepot until it reaches 110 degrees Fahrenheit. Then, add it into the bowl of a standing mixer, along with the yeast and 1 tablespoon of the sugar. Stir and then allow this to rest for 10 minutes.
In a small saucepot, heat the pineapple juice and vegan butter until the butter is melted and the mixture is also at 110 degrees Fahrenheit.
After the yeast mixture has rested for 10 minutes, add the warmed pineapple juice and butter, vanilla extract, the rest of the sugar, the flour, and salt into the mixing bowl.
Use the dough hook attachment, turn the mixer onto the lowest speed, and mix until everything is mostly combined. If needed, scrape down the sides and the bottom of the mixing bowl. Once everything is mostly combined, let the mixer knead the dough for 10 minutes.
Grease a large mixing bowl with vegan butter or pan spray. Once the dough has finished kneading, scrape it into the greased bowl and lightly grease the top of the dough as well. Directly place a piece of plastic wrap onto the dough as well as over the bowl. Place this in a dark, warm place to rest and partially rise for 1 hour.
After 1 hour, remove the piece of plastic wrap and "punch" the dough down twice. To do this, lightly grease your fist with butter or pan spray, and literally (gently) punch down near the dough's center twice.
Cover the dough, and it's bowl back in the plastic wrap, and place it in a dark, warm place to rest for 1 more hour. After it has finished resting for 1 hour, move on to the next steps.