Combine the soymilk, vinegar, and salt and let stand at least 10 minutes until it is thick and curdled.
Heat the agar in the water over medium-low heat, stirring constantly until it swells up.
Put the curdled milk, half of the oil, and the agar mixture in a blender and blend on high for one minute. Add the other half of the oil in a steady stream with the blender running until it emulsifies. If you are using a Vitamix (or other high-speed blender), start on Variable 1, and bring it up to Variable 6 while streaming in the remaining oil.
Notes
Per one tablespoon:
82 calories
9 g fat
1 g saturated fat
4 g monounsaturated fat
4 g polyunsaturated fat
0 g trans fat
0 g cholesterol
55 mg sodium (2 mg sodium with salt omitted)
8 mg potassium
0 g carbohydrate
0 g fiber
0 g sugars
0 g protein
2 Weight Watchers Points Plus
I have not been able to replicate this with any other type of nondairy milk. I have tried the following milks without success: rice, almond, hemp, coconut, and hazelnut. Soy milk curdles and gets beautifully thick. Make sure you use organic (non-GMO) soy milk. Store this in the refrigerator. It lasts about two weeks. You might see a little bit of separation; stir it and it will be fine.