Preheat oven to 200 degrees. Place the onions with their skins on in a baking dish and bake until soft all the way through. This can take up to around 45 minutes, but might be a bit longer or shorter depending on your oven. Onions should be well darkened on the outside and almost squishy to touch (very soft).
Allow the onions to cool until they’re comfortable to handle. Peel onions and discard off the skins. Place the peeled onions in a high-powered blender along with lemon juice and salt. Blend until silky smooth.
Measure out 1/2 cup of the onion cream for your dressing. The rest can go in the freezer or fridge and can be used next time you want to make this dressing.
Add onion cream plus the garlic to the blender and blend until smooth. Check the thickness. Add the 1/4 teaspoon of chia seeds (optionoal) and blend until smooth for extra thickness if you like.
Now add the fresh herbs, and blend in blender until you have your desired consistency.
Add salt & pepper to taste.
Refrigerate for at least one hour.
The flavor usually intensifies over time, so only add additional herbs and spices once you waited for an hour, to be on the safe side.
Serve as a salad dressing or a dipping sauce for vegetables and budhha bowls.