Craft Blaze Powder from Blaze Rods
Craft Glass Bottles from Glass
Fill Glass Bottles with Water to make Water Bottles
Place a Brewing Stand
Put Blaze Powder in the Brewing Stand fuel slot
Put Water Bottles in the bottom slots
Add Nether Wart to make Awkward Potions
Add Glistering Melon to make Potions of Healing
Add Redstone Dust to extend the healing potion duration?