Combine all ingredients except coarse salt until a smooth, thick batter forms
Spread onto a parchment-lined or silpat-lined baking sheet. Use an oiled rubber spatula, or oiled fingers for this, and do your best to get it evenly thin down to about the thickness of a nickel
Sprinkle with coarse salt, and any herbs or spices you like
Bake in preheated oven for about 10 minutes
Remove from oven and use a pizza cutter or knife to cut crackers into squares
Place back in oven and bake for another 20 minutes
Turn off oven and let rest in oven for 10-30 more minutes until crackers are crispy and completely dried through
Remove from oven and let cool completely
Seal into ziploc bags or other airtight container and store out of direct light