Roast Beef Sandwich of Yamakawa Ranch/山川牧場のローストビーフサンド
I love roast beef sandwich of Yamakawa Ranch(or Is "stock farm" a better expression?"). It costs 800 yen but I think it's worth trying. To get to the Yamakawa Ranch, take the prefectural road 43 from 338. If you are driving to Onuma Park from Hakodate, at the nearest intersection from Onuma Station, turn right. There is a Seven-Eleven on the corner.
Its soft served ice cream is delicious and attracts not only tourists but locals. Last weekend, I dropped by the ranch again and tried green tea(Macha)-taste ice cream. It costs 320 yen. I liked it, too.
I recommend trying their products if you have a chance;)
Akiko lives in a city next to Hakodate and loves to drive around Hakodate and surrounding area. I hope people who visit or live in the Southwest area of Hokkaido come to love the area, too. 函館の隣町在住で道南エリアのドライブ大好きAkikoです。道南を訪れたり、住んでいる人が土地を好きになってくれたらなぁ、と思います。