Soak the raisins in warm water for 10 minutes. Drain well.
Warm up a heat resistant bowl by placing hot water in it and then pouring it out,
In the warmed small bowl - gently mix the yeast, 1 tbsp honey and 1/4 cup lukewarm water.
Set aside for 15 minutes. This mixture should create bubbles and rise.
Place the spelt flour, oat flour & salt in a large bowl. Mix until blended and make a well in the center.
Pour the prepared yeast mixture into the well together with 1/2 cup of water.
In an electric mixer, on a low speed, start to mix with a hook attachment.
Gradually add the honey and olive oil.
Gradually add just enough water to a create a dough that solidifies into a circle but is not too sticky. It should come off the sides of the bowl.
Using the hook attachment, knead for 10 minutes keeping the speed low.
Add the pre-prepared raisins and knead for another two minutes.
Place a cloth loosely on top of the dough bowl and let the dough rise until double in size. This may take about 1 ½ hours, depending on the room temperature.
After the dough has risen create the challah form.