Core, peel and finely slice apple

Add to saucepan with sugar and water

<span class="mceItemHidden" data-mce-bogus="1"><span></span>Bring to boil over medium to high heat, then reduce heat and simmer for 20-30 minutes, or until apples are soft and practically <span class="mceItemHidden" data-mce-bogus="1"><span class="hiddenSpellError" pre="practically " data-mce-bogus="1">pureed</span></span>.</span>

In a bowl, combine oats, flour and brown sugar.

Add the butter, and use fingers to rub together the mixture with the butter. Make sure the butter is evenly spread. The flour mixture should resemble breadcrumbs.

<span class="mceItemHidden" data-mce-bogus="1"><span></span><span class="mceItemHidden" data-mce-bogus="1"><span class="hiddenSpellError" pre="" data-mce-bogus="1">Preheat</span></span> oven to <span class="hiddenSpellError" pre="to " data-mce-bogus="1">180C</span>/<span class="hiddenSpellError" pre="" data-mce-bogus="1">355F</span></span>

<span class="mceItemHidden" data-mce-bogus="1"><span></span>Evenly spread the apple into two <span class="mceItemHidden" data-mce-bogus="1"><span class="hiddenSpellError" pre="two " data-mce-bogus="1">ramekins</span></span>.</span>

Top apple with crumble mixture.

Place in oven for 15-20 minutes, or until crumble top is golden brown and crunchy.

<span class="mceItemHidden" data-mce-bogus="1"><span></span>Serve with vanilla <span class="mceItemHidden" data-mce-bogus="1"><span class="hiddenSpellError" pre="vanilla " data-mce-bogus="1">icecream</span></span></span>