Hey, I’m new to Blender, and I’ve created a simple asteroid model of about 20 polygons that I’d like to import into Unity and drop a texture on it. When I do so, the texture is all a solid color which does respond to changes in the texture color, but is never a texture instead of a solid color. Doing a bunch of searching, it looks like this is because I’m missing a UV map. I looked for tutorials, and found a few, but I don’t know if they’re old tutorials or what, but I can’t quite follow, and nothing I try allows me to drop a useful texture on my asteroid in Unity. Halp! 
Attached is a screenshot including the object in Unity and in Blender. As you can see, I smoothed out my asteroid shape using Subdivide - I don’t know if that’s part of the problem. I’ll be honest, I’m near-useless in Blender. For any advice you give or operations to try, could you please be as detailed as possible?
