Add a little spice to your sandwiches with this mustard!
Grind the mustard seed in spice grinder until it's a coarse powder.
Add mustard seed, vinegar, honey and oil to a medium sauce pan and heat over medium heat and whisk ingredients together.
Stir occassionally until the liquid starts to bubble, approximately 8 minutes. After it boils, remove from heat and whisk in the lime juice and chili flakes.
Add to an airtight container and store in the fridge for up to three months.