When an idea for a story or novel first occurs to me, I write it down in my Red Book of Plot Bunnies. The Bunny will be named, for easy identification, then transferred to a Word document "Bunny Hutch," where all the Bunnies intermingle and grow and mature and, Bunny-like, spawn baby Plot Bunnies.
Eventually I'll reach into the Hutch and pull out a Bunny for development. At this point, I start freewriting, fast fast fast, just spilling whatever comes to mind, asking questions, answering them, asking more, until I see the Bunny has been thoroughly pulverised and purified by the power of the Imagination and reborn as a basic Plot Skeleton.
Next I take the Plot Skeleton out of all the remaining Bunny bits and clean it up and start layering flesh onto it. The flesh-layering process is what produces my working outline. This outline tends to grow, in effect, to a very rough first draft, complete with fully dramatized scenes and dialogue. The working "outline" for my current WIP was 192 pages, single-spaced. Your outline length will vary, depending on how close to a draft it becomes over time. If a page or two is long enough for you, go for it.
I do outline writing in present tense -- for some reason, this signals my Inner Editor to shut up and mind his friggin' business, this is just doodling, nothing he needs to worry about. The last thing you want in the development and outlining process is an Inner Editor objecting to the necessary lunacy.
Once you have the working outline, don't fall in love with it. As you write the first draft, magic happens and things change. You'll want to explore new paths the outline could never have imagined. This is fine. Go ahead and explore, secure in the knowledge that the faithful outline is still there, ready to rescue you if you get lost.